<template>
  <div class="login_container">
    <div class="login_box">
      <!--      头像区域-->
      <div class="avatar_box">
        <img src="../assets/logo.png">
      </div>
      <!--表单区域-->
      <el-form label-width="0px" ref="loginFormRef" class="login_form" :model="loginForm" :rules="loginFormRules">
        <!--用户名-->
        <el-form-item prop="username">
          <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"
                    autocomplete="off"></el-input>
        </el-form-item>
        <!--密码-->
        <el-form-item prop="password">
          <el-input prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"
                    autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login()">登录</el-button>
          <el-button type="info" @click="resetLoginForm('loginFormRef')">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
  data () {
    return {
      // 登录表单登录绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单的验证规则对象
      loginFormRules: {
        username: [
          {
            required: true,
            message: '请输入用户名',
            trigger: 'blur'
          },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur'
          }],
        password: [
          {
            required: true,
            message: '请输入密码',
            trigger: 'blur'
          },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  methods: {
    login: function () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: result } = await this.$http.post('login', this.loginForm)
        if (result.meta.status !== 200) {
          return this.$message.error('登录失败')
        } else {
          // this.$message.success('登录成功')
          this.successTip()
          // 1.将登录成功之后的token,保存到客户端的 sessionStorage中
          // 1.1 项目中除了登录之外的其他API接口，必须在登录之后才能访问
          // 1.2 token 只应在当前网站打开期间生效，所在将token保存在sessionStorage中
          window.sessionStorage.setItem('token', result.data.token)
          // this.$router.push('home')
          // 2.通过编程式导航跳转到后台主页，路由地址是/home
          setTimeout(() => {
            this.$router.push('home')
          }, 1000)
        }
      })
    },
    resetLoginForm (formName) {
      this.$refs[formName].resetFields()
    },
    successTip: function () {
      this.$message({
        message: '登录成功',
        type: 'success',
        duration: 1000
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  height: 300px;
  width: 450px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }

  .btns {
    display: flex;
    justify-content: flex-end;
  }
}

</style>
